推力矢量飞行器动态控制分配方法研究

Research on Dynamic Control Allocation Method for Aircraft with Thrust Vector

主要研究了动态分配算法在推力矢量飞机上的应用。首先对该推力矢量飞机基于时标分离原理建模,控制系统分为快、慢回路。执行器的动态特性设为一阶惯性环节。然后分析了动态控制分配的算法及求解过程,并对该算法的动态特性和稳态特性做了必要的证明。针对推力矢量飞机包括传统舵面及推力矢量舵面在内的执行器的动态特性,对其进行了动态控制分配的仿真。仿真结果表明,高频执行器在机动过程中的使用程度相对增加了,飞行器跟踪姿态角指令更敏捷;推力矢量舵面偏转速率保持较小水平,有利于延长发动机的使用寿命。动态控制分配在推力矢量飞行器上的应用取得了良好的效果。

This paper focuses on the application of dynamic allocation method in the aircraft with thrust vector. Firstly, the aircraft is modeled by the time scale separation principle. The control system is divided into two loops of fast loop and slow loop. The dynamic characteristics of the actuator are set to a first order model. Then, the process of solving the dynamic allocation method is analyzed, and the dynamic property as well as steady property of the algorithm is proved. Simulation is carried out on dynamic control allocation of the aircraft with thrust vector, with consideration of the dynamic property of actuators including traditional actuators and thrust vector actuators. The simulation results show that ： 1 ） The using proportion of high frequency actuators is increased in the maneuvering process, and the speed of attitude angle command tracking is faster; and 2） The thrust vector actuators keep a lower deflection rate, which is conductive to prolong engine life. The dynamic control allocation method has achieved good effect in the application of the aircraft with thrust vector.